| tonsillar herniation | Herniation of the cerebellar tonsils through the foramen magnum. (05 Mar 2000) |
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| tonsillar ring | The broken ring of lymphoid tissue, formed of the lingual, faucial, and pharyngeal tonsils. Synonym: Bickel's ring, tonsillar ring, Waldeyer's throat ring. (05 Mar 2000) |